From 65845f29bec6bc17f80eff25c3bc39bcf3be9bf9 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Fri, 29 Aug 2014 13:40:45 +0900 Subject: [PATCH] ALSA: firewire-lib/dice: add arrangements of PCM pointer and interrupts for Dice quirk In IEC 61883-6, one data block transfers one event. In ALSA, the event equals one PCM frame, hence one data block transfers one PCM frame. But Dice has a quirk at higher sampling rate (176.4/192.0 kHz) that one data block transfers two PCM frames. Commit 10550bea44a8 ("ALSA: dice/firewire-lib: Keep dualwire mode but obsolete CIP_HI_DUALWIRE") moved some codes related to this quirk into Dice driver. But the commit forgot to add arrangements for PCM period interrupts and DMA pointer updates. As a result, Dice driver cannot work correctly at higher sampling rate. This commit adds 'double_pcm_frames' parameter to amdtp structure for this quirk. When this parameter is set, PCM period interrupts and DMA pointer updates occur at double speed than in IEC 61883-6. Reported-by: Daniel Robbins Fixes: 10550bea44a8 ("ALSA: dice/firewire-lib: Keep dualwire mode but obsolete CIP_HI_DUALWIRE") Signed-off-by: Takashi Sakamoto Cc: # 3.16 Signed-off-by: Takashi Iwai --- Reading git-format-patch failed